A toroidal iron core transformer leg adjustment device and process

Abstract

The invention discloses a foot adjustment device and process for a toroidal iron core transformer, comprising a foot adjustment platform, wherein a hollow groove is hollowed out in the center of the foot adjustment platform, and a cross-shaped pad is arranged at the lower side of the hollow groove; the cross-shaped pad is fixed to the back side of the foot adjustment platform; the cross-shaped pad divides the hollow groove into four metal pin sockets distributed in a rectangular array; a foot adjustment unit is arranged under the cross-shaped pad; before foot adjustment, the device can strictly constrain the position of each pin and straighten it; the invention can achieve the purpose of automatic foot adjustment, and the length of the metal pin after foot adjustment meets the standard length.

Description

Technical Field

[0001] The invention belongs to the field of transformer leg finishing technology. Background Art

[0002] In the process of transformer manufacturing, it is necessary to cut the pins of different lengths and too long on the transformer neatly. After cutting the pins, the lengths of all pins become standard lengths. Before cutting the pins, the positions of the pins need to be strictly constrained and straightened. Otherwise, the lengths of the pins will still be different in the end. At the same time, since the pins need to pass through the pin through holes on the PCB board during the reference process, it is best to trim the ends of the pins into a pointed cone shape, which will make it easier to pass through the pin through holes on the PCB board. The process device of this scheme can perfectly achieve the above process requirements. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a toroidal iron core transformer leg adjustment device and process, which can achieve the purpose of automatic leg adjustment, and the length of the metal pin after leg adjustment not only meets the standard length.

[0004] Technical solution: To achieve the above-mentioned purpose, a toroidal iron core transformer leg adjustment device of the present invention comprises a leg adjustment platform, a hollow groove is hollowed out in the center of the leg adjustment platform, a cross-shaped pad is arranged at the lower side of the hollow groove; the cross-shaped pad is fixed to the back of the leg adjustment platform; the cross-shaped pad divides the hollow groove into four metal pin sockets distributed in a rectangular array; a leg adjustment unit is arranged under the cross-shaped pad;

[0005] The transformer to be fixed comprises an iron core support and a circular iron core, on which a coil is wound; the circular iron core is fixed to the upper side of the iron core support; and a plurality of metal pins extending downward are distributed in a rectangular array on the lower side of the iron core support;

[0006] A vertical lifting and ejecting rod is arranged just above the hollow groove, and an elastic ejecting head is fixedly arranged at the lower end of the lifting and ejecting rod.

[0007] Furthermore, when the transformer to be assembled is in the workwear state, the lower surface of the core support fits the middle of the cross-shaped pad, and the four metal pins on the lower side of the core support respectively pass downward through the four metal pin sockets; and the elastic head elastically presses downward on the upper end of the circular core.

[0008] Furthermore, each metal pin socket is provided with a metal pin snap-in at the inner corner contour near the central end of the cross-shaped pad.

[0009] Furthermore, taking the horizontal plane as a reference system, the X direction and the Y direction are defined, the X direction includes the X+ and X- directions, and the Y direction includes the Y+ and Y- directions;

[0010] The pad arms in four directions of the cross-shaped pad are respectively the first pad arm, the second pad arm, the third pad arm and the fourth pad arm; the first pad arm, the second pad arm, the third pad arm and the fourth pad arm extend in the Y-direction, the X-direction, the Y+ direction and the X+ direction.

[0011] Further, it includes a first X-direction push block, a second X-direction push block, a third X-direction push block and a fourth X-direction push block; the driving structure can respectively drive the first X-direction push block, the second X-direction push block, the third X-direction push block and the fourth X-direction push block to perform translational movement in the X direction;

[0012] Based on the initial state, the first X-direction push block along the X+ direction, the second X-direction push block along the X- direction, the third X-direction push block along the X+ direction, and the fourth X-direction push block along the X- direction can be translated into the four metal pin sockets respectively;

[0013] When the first X-direction pushing block, the second X-direction pushing block, the third X-direction pushing block and the fourth X-direction pushing block have been translated into the four metal pin sockets respectively, a first strip guide opening extending along the Y direction is formed between the first X-direction pushing block and the first cushion block arm, two second strip guide openings extending along the Y direction are formed between the second X-direction pushing block and the first cushion block arm, a third strip guide opening extending along the Y direction is formed between the third X-direction pushing block and the third cushion block arm, and a fourth strip guide opening extending along the Y direction is formed between the fourth X-direction pushing block and the third cushion block arm.

[0014] Further, it includes a first Y-direction block, a second Y-direction block, a third Y-direction block and a fourth Y-direction block; the driving structure can respectively drive the first Y-direction block, the second Y-direction block, the third Y-direction block and the fourth Y-direction block to perform Y-direction translational motion;

[0015] On the basis that the first strip guide opening, the second strip guide opening, the third strip guide opening and the fourth strip guide opening are all formed, the first Y-direction embedment block along the Y+ direction, the second Y-direction embedment block along the Y+ direction, the third Y-direction embedment block along the Y- direction and the fourth Y-direction embedment block along the Y- direction can be respectively translated along the length direction to be embedded in the first strip guide opening, the second strip guide opening, the third strip guide opening and the fourth strip guide opening.

[0016] Furthermore, the whole-foot unit comprises a central motor, an expander, a whole-foot motor and a circular saw blade; the central motor is vertically fixed to the lower side of the center of the cross-shaped pad, the rotation output end of the central motor is vertically connected to the horizontal transverse expander through a fixed connector, the whole-foot motor is fixedly installed at the end of the expansion part of the transverse expander, the output shaft of the whole-foot motor faces upward, and is drivingly connected to the circular saw blade, the upper end of the circular saw blade is coaxially fixedly connected to a conical grinding column with a thin end facing upward, and the outer conical surface of the conical grinding column is a grinding surface;

[0017] With the cooperation of the central motor and the transverse telescopic device, the circular saw blade and the conical grinding column can make arbitrary horizontal movements; a column roller is coaxially arranged on the upper end of the conical grinding column, and the column roller and the conical grinding column are rotated coaxially through bearings, so that the column roller and the conical grinding column can freely rotate relative to each other along the axis; the outer diameter of the column roller is consistent with the outer diameter of the thin end of the conical grinding column; the outer diameter of the thick end of the conical grinding column is d1, the outer diameter of the circular saw blade is d2, and the outer diameter of the metal pin is d3; the following relationship is satisfied: (d2-d1) / 2>d3.

[0018] Furthermore, the transformer fixing tool to be fixed is firstly cut off the extra part of the lower end of the metal pin gradually, and the waste section of the pin after cutting falls off automatically, so that the metal pin reaches the standard length; and then the end of the metal pin is ground into a pointed cone.

[0019] Beneficial effect: before the pin is adjusted, the device can strictly constrain the position of each pin and straighten it. The invention can achieve the purpose of automatic pin adjustment. The length of the metal pin after the pin adjustment not only meets the standard length, but also the end of the metal pin after the pin adjustment is in a pointed cone shape, so it is convenient to pass through the pin through the hole on the PCB board later. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the toroidal core transformer to be fixed.

[0021] Figure 2 is an overall schematic diagram of the device;

[0022] Figure 3 This is a schematic diagram of the toroidal core transformer in the assembled state;

[0023] Figure 4 It is a schematic diagram of the "step one" and "step two" states;

[0024] Figure 5 This is the schematic diagram at the end of "Step 3", with the metal pins hidden in the figure;

[0025] Figure 6 This is the schematic diagram at the end of "Step 4", with the metal pins hidden in the figure;

[0026] Figure 7 This is a schematic diagram from the back side of the cross-shaped pad, and the state in the figure is the state at the end of "Step 4";

[0027] Figure 8 The schematic diagram of the three states of the structure after the whole foot platform is hidden for this device;

[0028] Fig. 9 This is a schematic diagram of the structure of the whole foot unit;

[0029] Fig.10 A schematic diagram of the pin end cutting and grinding process, specifically the process of "Step 5";

[0030] Fig.11 Schematic diagram of the pin end after trimming and grinding. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] As attached Figures 1 to 11 The described device for adjusting the foot of a circular iron core transformer comprises an adjusting platform 21, a hollow groove 22 is hollowed out in the center of the adjusting platform 21, and a cross-shaped pad 8 is arranged on the lower side of the hollow groove 22; the cross-shaped pad 8 is fixed to the back of the adjusting platform 21; the cross-shaped pad 8 divides the hollow groove 22 into four metal pin sockets 23 distributed in a rectangular array; each metal pin socket 23 is provided with a metal pin bayonet 24 at the inner corner contour near the central end of the cross-shaped pad 8; the transformer 60 to be adjusted comprises an iron core support 20 and a circular iron core 19, on which a coil is wound; the circular iron core 19 is fixed to the upper side of the iron core support 20; a plurality of metal pins 15 extending downward are distributed in a rectangular array on the lower side of the iron core support 20; a vertical lifting and ejecting rod 17 is arranged directly above the hollow groove 22, and an elastic pin 18 is fixedly arranged at the lower end of the lifting and ejecting rod 17; and an adjusting unit 9 is arranged below the cross-shaped pad 8.

[0033] like Figure 3 When the transformer 60 to be assembled is in the tooling state, the lower surface of the core support 20 fits in the middle of the cross-shaped pad 8, and the middle of the upper surface of the cross-shaped pad 8 has a limiting groove whose contour is adapted to the outer contour of the core support 20, and the four metal pins 15 on the lower side of the core support 20 respectively pass downward through the four metal pin sockets 23; and the elastic head 18 elastically presses the upper end of the circular core 19 downward.

[0034] Taking the horizontal plane as the reference system, define the X direction and the Y direction. The X direction includes the X+ and X- directions, and the Y direction includes the Y+ and Y- directions.

[0035] The pad arms in four directions of the cross-shaped pad 8 are respectively the first pad arm 8a, the second pad arm 8b, the third pad arm 8c and the fourth pad arm 8d; the first pad arm 8a, the second pad arm 8b, the third pad arm 8c and the fourth pad arm 8d extend in the Y-direction, the X-direction, the Y+ direction and the X+ direction;

[0036] The upper ends of the first cushion arm 8a, the second cushion arm 8b, the third cushion arm 8c and the fourth cushion arm 8d are all fixedly connected to the back of the whole foot platform 21;

[0037] It also includes a first X-direction push block 2a, a second X-direction push block 2b, a third X-direction push block 2c and a fourth X-direction push block 2d; the driving structure can respectively drive the first X-direction push block 2a, the second X-direction push block 2b, the third X-direction push block 2c and the fourth X-direction push block 2d to perform translational movement in the X direction;

[0038] Based on the initial state, the first X-direction push block 2a along the X+ direction, the second X-direction push block 2b along the X- direction, the third X-direction push block 2c along the X+ direction, and the fourth X-direction push block 2d along the X- direction can be translated into the four metal pin sockets 23 respectively;

[0039] When the first X-direction push block 2a, the second X-direction push block 2b, the third X-direction push block 2c and the fourth X-direction push block 2d have been translated into the four metal pin sockets 23 respectively, a first strip guide opening 35a extending along the Y direction is formed between the first X-direction push block 2a and the first cushion block arm 8a, two second strip guide openings 35b extending along the Y direction are formed between the second X-direction push block 2b and the first cushion block arm 8a, a third strip guide opening 35c extending along the Y direction is formed between the third X-direction push block 2c and the third cushion block arm 8c, and a fourth strip guide opening 35d extending along the Y direction is formed between the fourth X-direction push block 2d and the third cushion block arm 8c; the widths of the first strip guide opening 35a, the second strip guide opening 35b, the third strip guide opening 35c and the fourth strip guide opening 35d are all adapted to the outer diameter of the metal pin 15;

[0040] It also includes a first Y-direction insert 1a, a second Y-direction insert 1b, a third Y-direction insert 1c and a fourth Y-direction insert 1d; the driving structure can respectively drive the first Y-direction insert 1a, the second Y-direction insert 1b, the third Y-direction insert 1c and the fourth Y-direction insert 1d to perform Y-direction translational motion;

[0041] On the basis that the first strip guide opening 35a, the second strip guide opening 35b, the third strip guide opening 35c and the fourth strip guide opening 35d are all formed, the first Y-direction insert block 1a along the Y+ direction, the second Y-direction insert block 1b along the Y+ direction, the third Y-direction insert block 1c along the Y- direction, and the fourth Y-direction insert block 1d along the Y- direction can be respectively translated to be embedded in the first strip guide opening 35a, the second strip guide opening 35b, the third strip guide opening 35c and the fourth strip guide opening 35d along the length direction;

[0042] The first X-direction push block 2a and the third X-direction push block 2c are fixedly connected to the first connection block 3a and the third connection block 3c on one side in the X-direction, respectively; the second X-direction push block 2b and the fourth X-direction push block 2d are fixedly connected to the second connection block 3b and the fourth connection block 3d on one side in the X+ direction, respectively;

[0043] In this case, the driving structure for driving the first X-direction push block 2a, the second X-direction push block 2b, the third X-direction push block 2c, the fourth X-direction push block 2d, the first Y-direction insert block 1a, the second Y-direction insert block 1b, the third Y-direction insert block 1c and the fourth Y-direction insert block 1d is as follows:

[0044] like Figure 7 As shown, the first thread drive block 4a, the second thread drive block 4b, the third thread drive block 4c and the fourth thread drive block 4d are respectively arranged in parallel on one side of the end face of the first cushion arm 8a, the second cushion arm 8b, the third cushion arm 8c and the fourth cushion arm 8d;

[0045] The first Y-direction insert block 1a and the second Y-direction insert block 1b are parallelly slidably matched to the two side surfaces of the first cushion block arm 8a, and the Y-direction ends of the first Y-direction insert block 1a and the second Y-direction insert block 1b are fixedly connected to the two ends of the first thread driving block 4a;

[0046] The third Y-direction insert block 1c and the fourth Y-direction insert block 1d are parallelly slidably matched to the two side surfaces of the third cushion block arm 8c, and the Y+ direction ends of the third Y-direction insert block 1c and the fourth Y-direction insert block 1d are fixedly connected to the two ends of the third thread driving block 4c;

[0047] The first connecting block 3a and the third connecting block 3c are respectively fixedly connected to the two ends of the second threaded driving block 4b through two first sliding arms 5.1, and the two first sliding arms 5.1 are parallel and slidably matched with the two side surfaces of the second cushion block arm 8b;

[0048] The second connecting block 3b and the fourth connecting block 3d are respectively fixedly connected to the two ends of the fourth threaded driving block 4d through two second sliding arms 5.2, and the two second connecting blocks 3b and the fourth connecting block 3d are parallelly slidably matched to the two side surfaces of the fourth cushion block arm 8d;

[0049] The centers of the first threaded drive block 4a, the second threaded drive block 4b, the third threaded drive block 4c and the fourth threaded drive block 4d are all provided with threaded transmission holes, and the threaded transmission holes on the first threaded drive block 4a, the threaded transmission holes on the second threaded drive block 4b, the threaded transmission holes on the third threaded drive block 4c and the threaded transmission holes on the fourth threaded drive block 4d are respectively threadedly matched with the first threaded transmission rod 6a, the second threaded transmission rod 6b, the third threaded transmission rod 6c and the fourth threaded transmission rod 6d; the first threaded transmission rod 6a, the second threaded transmission rod 6b, the third threaded transmission rod 6c and the fourth threaded transmission rod 6d are respectively driven by four independent motors; the first threaded transmission rod 6a and the third threaded transmission rod 6c extend along the Y direction; the second threaded transmission rod 6b and the fourth threaded transmission rod 6d both extend along the X direction.

[0050] like Fig. 9 and 10 As shown, the whole foot unit 9 includes a central motor 10, an expander 12, a whole foot motor 14 and a circular saw blade 16; the central motor 10 is vertically fixed to the lower central side of the cross-shaped pad 8, and the rotation output end of the central motor 10 is vertically connected to the horizontal transverse expander 12 through a fixed connector 11, and the whole foot motor 14 is fixedly installed at the end of the expansion part 13 of the transverse expander 12, and the output shaft of the whole foot motor 14 faces upward, and is driven to connect to the circular saw blade 16, and the upper end of the circular saw blade 16 is coaxially fixedly connected with a conical grinding column 24 with a thin end facing upward, and the outer conical surface of the conical grinding column 24 is a grinding surface.

[0051] The circular saw blade 16 and the conical grinding column 24 can make any horizontal movement under the cooperation of the central motor 10 and the transverse expansion device 12; the upper end of the conical grinding column 24 is provided with a column roller 23 coaxially, and the column roller 23 and the conical grinding column 24 are rotated coaxially with the bearing, so that the column roller 23 and the conical grinding column 24 can rotate freely relative to each other along the axis;

[0052] The outer diameter of the column roller 23 is consistent with the outer diameter of the thin end of the conical grinding column 24; assuming that the outer diameter of the thick end of the conical grinding column 24 is d1, the outer diameter of the circular saw blade 16 is d2, and the outer diameter of the metal pin 15 is d3; the following relationship is satisfied: (d2-d1) / 2>d3, which ensures that the conical grinding column 24 has not yet contacted the metal pin 15 when the circular saw blade 16 cuts off the metal pin 15.

[0053] Process:

[0054] Step 1: In the initial state, the four metal pin sockets 23 are all connected vertically. Figure 4 As shown;

[0055] Step 2: manually or mechanically fit the lower surface of the core support 20 of the transformer 60 to be fixed to the middle of the cross-shaped pad 8, and make the four metal pins 15 on the lower side of the core support 20 pass through the four metal pin sockets 23 downward respectively, so that the ends of the four metal pins 15 all extend downward from the back of the cross-shaped pad 8; then control the elastic head 18 to press down, so that the elastic head 18 elastically presses the upper end of the ring core 19 downward, so that the transformer 60 to be fixed is fixed, as shown in FIG. Figure 3 ;

[0056] Step three, respectively drive the first X-direction push block 2a along the X+ direction, the second X-direction push block 2b along the X-direction, the third X-direction push block 2c along the X+ direction, and the fourth X-direction push block 2d along the X-direction to be translated into the four metal pin sockets 23 respectively; so that a first strip guide opening 35a extending along the Y direction is formed between the first X-direction push block 2a and the first cushion block arm 8a, two second strip guide openings 35b extending along the Y direction are formed between the second X-direction push block 2b and the first cushion block arm 8a, a third strip guide opening 35c extending along the Y direction is formed between the third X-direction push block 2c and the third cushion block arm 8c, and a fourth strip guide opening 35d extending along the Y direction is formed between the fourth X-direction push block 2d and the third cushion block arm 8c.

[0057] The four metal pins 15 inserted into the metal pin sockets 23 are pushed in the X direction by the first X direction push block 2a, the second X direction push block 2b, the third X direction push block 2c, and the fourth X direction push block 2d, so that the four metal pins 15 are respectively constrained in the first strip guide opening 35a, the second strip guide opening 35b, the third strip guide opening 35c, and the fourth strip guide opening 35d. Figure 5 shown.

[0058] Step 4: Drive the first Y-direction insert 1a along the Y+ direction, the second Y-direction insert 1b along the Y+ direction, the third Y-direction insert 1c along the Y- direction, and the fourth Y-direction insert 1d along the Y- direction to be respectively translated to be embedded in the first strip guide opening 35a, the second strip guide opening 35b, the third strip guide opening 35c, and the fourth strip guide opening 35d along the length direction; the four metal pins 15 are respectively clamped and pressed under the push of the first Y-direction insert 1a, the second Y-direction insert 1b, the third Y-direction insert 1c, and the fourth Y-direction insert 1d. In the four metal pin bayonet 24; at this time, the four metal pins 15 are automatically straightened under the lateral clamping constraint, and are strictly distributed in a rectangular array according to the distribution of the four metal pin bayonet 24, so that the horizontal coordinates of the axes of the four metal pins 15 extending downward to the bottom of the cross-shaped pad 8 are respectively consistent with the horizontal coordinates of the axes of the four metal pin bayonet 24. Since the coordinates of the axes of the four metal pin bayonet 24 are predetermined, the coordinates of the axes of the four metal pins 15 in the horizontal direction are obtained in this step, such as Figure 6 shown.

[0059] Step 5: Fig.10 As shown, first start the whole-leg motor 14 to make the circular saw blade 16 and the conical grinding column 24 rotate at high speed along the axis; at the same time, with the cooperation of the central motor 10 and the transverse expander 12, the axial coordinates of the circular saw blade 16 and the conical grinding column 24 are moved gradually close to the axial coordinates of any metal pin 15; until the edge of the circular saw blade 16 begins to cut the lower end of the metal pin 15, the circular saw blade 16 first gradually cuts off the extra part of the lower end of a metal pin 15, and the discarded pin section 15.1 falls automatically after the cut, and at this time the length of the metal pin 15 after being cut once is just the expected length, so the metal pin 15 reaches the standard length.

[0060] Subsequently, the axial coordinates of the circular saw blade 16 and the conical grinding column 24 are controlled to continue to move gradually closer to the axial coordinates of the metal pin 15, so that the conical grinding column 24 grinds a notch on one side of the lower end of the metal pin 15; until the wheel surface of the column roller 23 is tangent to the metal pin 15, the conical grinding column 24 cannot continue to advance along the radial direction of the metal pin 15 due to the obstruction of the column roller 23, so that the upper central motor 10 and the transverse telescope 12 are both subject to sudden resistance.

[0061] At this time, the central motor 10 and the transverse expander 12 are immediately controlled to make the axial coordinates of the circular saw blade 16 and the conical grinding column 24 make a circular motion around the axial coordinates of the metal pin 15, and the column roller 23 rolls around the metal pin 15. The process of the column roller 23 rolling around the metal pin 15 will produce a real-time constraint on the conical grinding column 24 to avoid excessive grinding of the conical grinding column 24 at any time. In the process of the conical grinding column 24 rotating and grinding around the lower end of the metal pin 15 for one circle, the lower end of the metal pin 15 is ground into a pointed cone 15a, such as Fig.11 shown.

[0062] Then, the length of the remaining three metal pins 15 are controlled and the ends are sharpened according to the above method, so as to achieve the purpose of automatic pin adjustment. The length of the metal pin 15 after the adjustment not only meets the standard length, but also the end of the metal pin 15 after the adjustment is in a pointed cone shape, so that it is convenient to pass through the pin through the hole on the PCB board later.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A toroidal iron core transformer foot adjustment device, characterized in that: it comprises a foot adjustment platform (21), the foot adjustment platform (21) has a hollowed-out groove (22) in the center, a cross-shaped pad (8) is arranged on the lower side of the hollowed-out groove (22); the cross-shaped pad (8) is fixed to the back side of the foot adjustment platform (21); the cross-shaped pad (8) divides the hollowed-out groove (22) into four metal pin sockets (23) distributed in a rectangular array; a foot adjustment unit (9) is arranged below the cross-shaped pad (8); The transformer (60) to be rectified comprises an iron core support (20) and an annular iron core (19), wherein a coil is wound on the annular iron core (19); the annular iron core (19) is fixed to the upper side of the iron core support (20); and a plurality of metal pins (15) extending downward are distributed in a rectangular array on the lower side of the iron core support (20); A vertical lifting and ejecting rod (17) is arranged directly above the hollow groove (22), and an elastic ejecting head (18) is fixedly arranged at the lower end of the lifting and ejecting rod (17); When the transformer (60) to be assembled is in a work-installed state, the lower surface of the core support (20) fits the middle of the cross-shaped pad (8), and the four metal pins (15) on the lower side of the core support (20) respectively pass downward through the four metal pin sockets (23); and the elastic head (18) elastically presses downward against the upper end of the annular core (19); Each metal pin socket (23) is provided with a metal pin bayonet (24) at the inner corner contour close to the central end of the cross-shaped pad (8); Taking the horizontal plane as the reference system, define the X direction and Y direction. The X direction includes the X+ and X- directions, and the Y direction includes the Y+ and Y- directions. The pad arms in four directions of the cross-shaped pad (8) are respectively a first pad arm (8a), a second pad arm (8b), a third pad arm (8c) and a fourth pad arm (8d); the first pad arm (8a), the second pad arm (8b), the third pad arm (8c) and the fourth pad arm (8d) extend in the Y-direction, the X-direction, the Y+ direction and the X+ direction; It comprises a first X-direction pushing block (2a), a second X-direction pushing block (2b), a third X-direction pushing block (2c) and a fourth X-direction pushing block (2d); the driving structure can respectively drive the first X-direction pushing block (2a), the second X-direction pushing block (2b), the third X-direction pushing block (2c) and the fourth X-direction pushing block (2d) to perform translational movement in the X direction; Based on the initial state, the first X-direction push block (2a) can be translated into the four metal pin sockets (23) along the X+ direction, the second X-direction push block (2b) can be translated into the X- direction, the third X-direction push block (2c) can be translated into the X+ direction, and the fourth X-direction push block (2d) can be translated into the four metal pin sockets (23) along the X- direction respectively; When the first X-direction push block (2a), the second X-direction push block (2b), the third X-direction push block (2c) and the fourth X-direction push block (2d) have been translated into the four metal pin sockets (23) respectively, a first strip-shaped guide opening (35a) extending along the Y direction is formed between the first X-direction push block (2a) and the first cushion block arm (8a), two second strip-shaped guide openings (35b) extending along the Y direction are formed between the second X-direction push block (2b) and the first cushion block arm (8a), a third strip-shaped guide opening (35c) extending along the Y direction is formed between the third X-direction push block (2c) and the third cushion block arm (8c), and a fourth strip-shaped guide opening (35d) extending along the Y direction is formed between the fourth X-direction push block (2d) and the third cushion block arm (8c); It comprises a first Y-direction insert (1a), a second Y-direction insert (1b), a third Y-direction insert (1c) and a fourth Y-direction insert (1d); the driving structure can respectively drive the first Y-direction insert (1a), the second Y-direction insert (1b), the third Y-direction insert (1c) and the fourth Y-direction insert (1d) to perform Y-direction translational motion; On the basis that the first strip guide opening (35a), the second strip guide opening (35b), the third strip guide opening (35c) and the fourth strip guide opening (35d) are all formed, the first Y-direction insert block (1a) along the Y+ direction, the second Y-direction insert block (1b) along the Y+ direction, the third Y-direction insert block (1c) along the Y- direction and the fourth Y-direction insert block (1d) along the Y- direction can be respectively translated to be embedded in the first strip guide opening (35a), the second strip guide opening (35b), the third strip guide opening (35c) and the fourth strip guide opening (35d) along the length direction; The foot-shaping unit (9) comprises a central motor (10), an expander (12), a foot-shaping motor (14) and a circular saw blade (16); the central motor (10) is vertically fixed to the central lower side of the cross-shaped pad (8); the rotation output end of the central motor (10) is vertically connected to the horizontal transverse expander (12) through a fixed connector (11); the foot-shaping motor (14) is fixedly installed at the end of the expansion part (13) of the transverse expander (12); the output shaft of the foot-shaping motor (14) faces upward and is drivingly connected to the circular saw blade (16); the upper end of the circular saw blade (16) is coaxially fixedly connected to a conical grinding column (24) with a thin end facing upward, and the outer conical surface of the conical grinding column (24) is a grinding surface; With the cooperation of the central motor (10) and the transverse expander (12), the circular saw blade (16) and the conical grinding column (24) can make any horizontal movement; a column roller (23) is coaxially arranged at the upper end of the conical grinding column (24); the column roller (23) and the conical grinding column (24) are coaxially rotated through a bearing, so that the column roller (23) and the conical grinding column (24) can freely rotate relative to each other along the axis; the outer diameter of the column roller (23) is consistent with the outer diameter of the thin end of the conical grinding column (24); the outer diameter of the thick end of the conical grinding column (24) is d1, the outer diameter of the circular saw blade (16) is d2, and the outer diameter of the metal pin (15) is d3; the following relationship is satisfied: (d2-d1) / 2>d3.

2. The leg-forming process of the leg-forming device for a toroidal core transformer according to claim 1, characterized in that: The transformer (60) to be fixed is fixed with a tooling, and the extra part of the lower end of the metal pin (15) is gradually cut off, and the waste pin section (15.1) after the cut-off falls off automatically, so that the metal pin (15) reaches the standard length; and then the end of the metal pin (15) is ground into a pointed cone shape.

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